[ Astarion should take responsibility for his own feelings. Iorveth didn't make him feel unimportant, he made himself feel unimportant. But he doesn't have the emotional maturity to acknowledge that, and so instead he shrugs, a sort of nonverbal 'it's all right'. ]

I know it might be a bit shocking to hear, considering how impossibly wonderful and lovable I am—

[ Iorveth may be the only one who would ever agree with that statement. ]

But I suppose I'm a bit... [ He shifts uncomfortably, as if it's viscerally unpleasant to admit this. ] Jealous of those Aen Seidhe of yours.

[ Iorveth is everything to him, but the Aen Seidhe are everything to Iorveth. It's hard not to be jealous. ]